It had been expected that Written By would head to the Golden Slipper without another run, however Sydney's wet weather has forced a change of plan.

Written By was down to trial on Tuesday morning, but those plans were thwarted after Randwick received 53mm of rain overnight causing the cancellation of the morning's heats on the refurbished Kensington track.

While the trials have been rescheduled for Thursday, they have been moved onto the steeple grass at Randwick, a surface Begg has described as "totally unacceptable."

"With the Sydney fickle weather coming into play, the trials were moved from the Kensington track to the steeple grass which is a totally unacceptable surface," Begg said on Twitter.

"The decision has been made for Written By to take his place in the Pago Pago Stakes this Saturday."

With the Sydney fickle weather coming into play, the trials were moved from the Kensington track to the Steeple grass which is a totally unacceptable surface. The decision has been made for Written By to take his place in the Pago Pago Stakes this Saturday @JChilds47@atc_racespic.twitter.com/Z8NqQBqCh7